This is so cheap & easy, its almost stupid. Save tabacco from butts or buy pipe tobacco. Fill qt jar, cover tobacco with isopropal (spelling) alcohol, let steep a week or more, shaking once, twice a day. When ready to use, strain into gallon jug, top with water & add 1Tbs joy dish soap, non concentrate. Place in spray bottle & use. What you now have is homemade nicotine sulphate. You will need to rinse your plants well before harvest.